diff --git a/src/hover.cpp b/src/hover.cpp
index 8811157..67a30b3 100644
--- a/src/hover.cpp
+++ b/src/hover.cpp
@@ -2,6 +2,7 @@ struct Sec_Hover_Info {
   Byte_Range rng;
   // A string tree where children are more indented than parents
   String8_Node *desc;
+  String8_Node *highlighted_desc;
 };
 
 template <typename T> T bswap_if_needed(T x) { return x; }
@@ -133,8 +134,10 @@ struct Sec_Hover_Fn {
       u64 sec_len = cur_field_off - sec_start;
       info.rng = { start + sec_start, sec_len };
       // In case of nested sections, only highlight the innermost
-      // FIXME!
-      info.desc->selected = innermost_section_highlighted < cur_section_nesting;
+      // FIXME: sometimes no section ends up highlighted!
+      if (innermost_section_highlighted <= cur_section_nesting) {
+        info.highlighted_desc = info.desc;
+      }
       innermost_section_highlighted = max(cur_section_nesting, innermost_section_highlighted);
       // ended = true;
     }
@@ -159,7 +162,8 @@ struct Sec_Hover_Fn {
     T val;
     memcpy(&val, (u8 *)data + start + cur_field_off, field_len);
     String8_Node *desc = display_val(arena, info.desc, desc_fmt, val);
-    desc->selected = hovered && !display_grouped;
+    if (hovered && !display_grouped)
+      info.highlighted_desc = desc;
     if (val_read)
       *val_read = val;
 
@@ -195,7 +199,8 @@ struct Sec_Hover_Fn {
     buf[str_size] = 0;
     String8 s = { buf, str_size };
     String8_Node *desc = display_val(arena, info.desc, desc_fmt, s);
-    desc->selected = hovered && !display_grouped;
+    if (hovered && !display_grouped)
+      info.highlighted_desc = desc;
 
     if (display_grouped || hovered) {
       info.rng = { start + cur_field_off, field_len };
@@ -224,7 +229,9 @@ struct Sec_Hover_Fn {
 
     b8 hovered = cur_field_off <= roff && roff < cur_field_off + range_len;
     String8_Node *dsc = display_val(arena, info.desc, desc, data + start + cur_field_off);
-    dsc->selected = hovered && !display_grouped;
+    if (hovered && !display_grouped)
+      info.highlighted_desc = dsc;
+
     if (display_grouped || hovered) {
       info.rng = { start + cur_field_off, range_len };
       // ended = !display_grouped;
@@ -246,7 +253,8 @@ struct Sec_Hover_Fn {
         if (was_zipped)
           *was_zipped = true;
         info.rng = { start + cur_field_off, range_len };
-        info.desc->selected = hovered;
+        if (hovered)
+          info.highlighted_desc = info.desc;
         // ended = !display_grouped;
       }
       cur_field_off += range_len;
@@ -297,7 +305,7 @@ struct Sec_Hover_Fn {
         field_str8<u8>("Obj Name: %s");
         field_str8<u8>("Obj Title: %s");
       }
-    });
+    }, HoverSec_HideIfNotHovered);
   }
 
   void envelope_preamble()
@@ -329,7 +337,6 @@ struct Sec_Hover_Fn {
     titled_section(titlestr.c(), [this, &frame_type, &frame_size = size, n_items, titlestr] {
       i64 size;
       memcpy(&size, data + start + cur_field_off, sizeof(size));
-      printf("frame header %s read size %ld at 0x%lX\n", titlestr.c(), size, start + cur_field_off);
       if (size >= 0) {
         frame_type = Frame_Record;
         field<i64>("Record frame size: %" PRIi64 " B", hover_display_val_le_abs<i64>);
@@ -414,7 +421,6 @@ struct Sec_Hover_Fn {
         return;
       }
 
-      field_le<i64>("Size: %" PRIi64 " B");
       field<u16>("Column type: %s", [](Arena *arena, String8_Node *prev, const char *fmt, u16 val) {
         const char *readable_col_type = get_column_type_name(val);
         return push_str8_node_child(arena, prev, fmt, readable_col_type);
@@ -535,7 +541,7 @@ struct Sec_Hover_Fn {
         field_be<u64>("Len Footer: %u");
         field_be<u64>("Max Key Size: %u");
         field_le<u64>("Checksum: 0x%" PRIX64);
-      });
+      }, HoverSec_HideIfNotHovered);
     });
   }
 
@@ -543,25 +549,27 @@ struct Sec_Hover_Fn {
   {
     titled_section("RNTuple Header", [this] {
       tkey();
-      b8 zipped;
-      if (!maybe_rootzip(&zipped))
-        return;
+      titled_section("Data", [this] {
+        b8 zipped;
+        if (!maybe_rootzip(&zipped))
+          return;
 
-      if (zipped) {
-        // XXX: why -1?
-        range("Compressed payload", section.range.len - section.post_size - sizeof(u64) - 1);
-        field_le<u64>("Checksum: 0x%" PRIX64);
-      } else {
-        envelope_preamble();
-        // NOTE: flags in principle require a more complex handling, but for now they are unused,
-        // so they're always occupying only 8 bytes.
-        field_le<u64>("Flags: 0x%" PRIX64);
-        field_str8<u32>("Name: %s");
-        field_str8<u32>("Description: %s");
-        field_str8<u32>("ROOT version: %s");
-        schema_description("Schema Description");
-        field_le<u64>("Checksum: 0x%" PRIX64);
-      }
+        if (zipped) {
+          // XXX: why -1?
+          range("Compressed payload", section.range.len - section.post_size - sizeof(u64) - 1);
+          field_le<u64>("Checksum: 0x%" PRIX64);
+        } else {
+          envelope_preamble();
+          // NOTE: flags in principle require a more complex handling, but for now they are unused,
+          // so they're always occupying only 8 bytes.
+          field_le<u64>("Flags: 0x%" PRIX64);
+          field_str8<u32>("Name: %s");
+          field_str8<u32>("Description: %s");
+          field_str8<u32>("ROOT version: %s");
+          schema_description("Schema Description");
+          field_le<u64>("Checksum: 0x%" PRIX64);
+        }
+      }, HoverSec_HideIfNotHovered);
     });
   }
   
@@ -569,31 +577,52 @@ struct Sec_Hover_Fn {
   {
     titled_section("RNTuple Footer", [this] {
       tkey();
-      b8 zipped;
-      if (!maybe_rootzip(&zipped)) 
-        return;
+      titled_section("Data", [this] {
+        b8 zipped;
+        if (!maybe_rootzip(&zipped)) 
+          return;
 
-      if (zipped) {
-        // XXX: why -1?
-        range("Payload", section.range.len - section.post_size - sizeof(u64) - 1);
-        field_le<u64>("Checksum: 0x%" PRIX64);
-      } else {
-        envelope_preamble();
-        // NOTE: flags in principle require a more complex handling, but for now they are unused,
-        // so they're always occupying only 8 bytes.
-        field_le<u64>("Flags: 0x%" PRIX64);
-        field_le<u64>("Header checksum: 0x%" PRIX64);
-        u64 size;
-        Frame_Type ftype = frame_header(size);
-        assert(ftype == Frame_Record);
-        schema_description("Schema Extension");
-        //  - list of column group record frames (TODO)
-        //frame_header("Column Groups");
-        //  - list of cluster group record frames (TODO)
-        //frame_header("Cluster Groups");
-        range("Payload", section.range.len - cur_field_off);
-        field_le<u64>("Checksum: 0x%" PRIX64);
-      }
+        if (zipped) {
+          // XXX: why -1?
+          range("Payload", section.range.len - section.post_size - sizeof(u64) - 1);
+          field_le<u64>("Checksum: 0x%" PRIX64);
+        } else {
+          envelope_preamble();
+          // NOTE: flags in principle require a more complex handling, but for now they are unused,
+          // so they're always occupying only 8 bytes.
+          field_le<u64>("Flags: 0x%" PRIX64);
+          field_le<u64>("Header checksum: 0x%" PRIX64);
+          u64 size;
+          Frame_Type ftype = frame_header(size);
+          assert(ftype == Frame_Record);
+          schema_description("Schema Extension");
+          //  - list of column group record frames (TODO)
+          //frame_header("Column Groups");
+          //  - list of cluster group record frames (TODO)
+          //frame_header("Cluster Groups");
+          range("Payload", section.range.len - cur_field_off);
+          field_le<u64>("Checksum: 0x%" PRIX64);
+        }
+      }, HoverSec_HideIfNotHovered);
+    });
+  }
+
+  void page_list()
+  {
+    titled_section("Page List", [this] {
+      tkey();
+      titled_section("Data", [this] {
+        b8 zipped;
+        if (!maybe_rootzip(&zipped))
+          return;
+        if (zipped) {
+          // XXX: why -1?
+          range("Payload", section.range.len - section.post_size - sizeof(u64) - 1);
+          field_le<u64>("Checksum: 0x%" PRIX64);
+        } else {
+          // TODO
+        }
+      }, HoverSec_HideIfNotHovered);
     });
   }
   
@@ -734,15 +763,11 @@ Sec_Hover_Info get_section_hover_info(Arena *arena, Section section, u64 off, co
     hover.rntuple_footer();
   } break;
 
-  #if 0
   case Sec_Page_List: {
-    hover.tkey()
-    || hover.maybe_rootzip()
-    || hover.range("Payload", section.range.len - section.post_size) // TODO: improve
-    || hover.field_le<u64>("Checksum: 0x%" PRIX64)
-    ;
+    hover.page_list();
   } break;
 
+  #if 0
   case Sec_Page: {
     // only try hovering a key if this is the first page of the cluster (<=> pre_size != 0)
     b8 ok = section.pre_size && hover.tkey();
diff --git a/src/render.cpp b/src/render.cpp
index bd296b5..433d5ec 100644
--- a/src/render.cpp
+++ b/src/render.cpp
@@ -213,7 +213,7 @@ void viewer_jump_to_cluster(App_State &app, u64 cluster_idx)
 }
 
 internal
-void imgui_render_string_tree(Arena *arena, String8_Node *root, u16 indent = 0)
+void imgui_render_string_tree(Arena *arena, String8_Node *root, String8_Node *highlighted, u16 indent = 0)
 {
   String8 indent_str;
   if (indent) {
@@ -225,13 +225,13 @@ void imgui_render_string_tree(Arena *arena, String8_Node *root, u16 indent = 0)
   }
   
   for (String8_Node *node = root; node; node = node->next) {
-    if (node->selected)
+    if (node == highlighted)
       ImGui::TextColored(ImColor(1.0f, 1.0f, 0.0f), "%s%s", indent_str.c(), node->str.c());
     else
       ImGui::Text("%s%s", indent_str.c(), node->str.c());
 
     if (node->first_child)
-      imgui_render_string_tree(arena, node->first_child, indent + 2);
+      imgui_render_string_tree(arena, node->first_child, highlighted, indent + 2);
   }
 }
 
@@ -400,7 +400,7 @@ void update_and_render(Arena *arena, App_State &app, f32 delta_time_ms)
           ImGui::TextColored(ImColor(0.5f, 0.5f, 0.5f), "(Hint: press Alt for single-field hover information)");
         if (hovered_section.id == Sec_Page)
           ImGui::TextColored(ImColor(0.5f, 0.5f, 0.5f), "(Hint: Shift-Click to jump to the start of this page)");
-        imgui_render_string_tree(scratch.arena, hover_info.desc->head);
+        imgui_render_string_tree(scratch.arena, hover_info.desc->head, hover_info.highlighted_desc);
         app.viewer.hovered_range = hover_info.rng;
 
         // Shift-clicking on a page section will update the current page in the legend
diff --git a/src/str.h b/src/str.h
index 25e9a0c..e2cdaba 100644
--- a/src/str.h
+++ b/src/str.h
@@ -15,6 +15,4 @@ struct String8_Node {
   String8_Node *next, *prev, *head;
   String8_Node *first_child, *last_child;
   String8 str;
-  // @Cleanup: only used by hover.cpp, it should not belong in here...
-  b8 selected;
 };